<template>
  <div>
    <el-card class="box-card">
      <div slot="header" class="clearfix">
        <span>文章列表</span>
      </div>
      <!-- 搜索区域 -->
      <div class="search-box">
        <el-form :inline="true" :model="filter">
          <el-form-item label="文章分类">
            <el-select
              v-model="filter.cate_id"
              placeholder="请选择分类"
              size="small"
            >
              <el-option
                :label="item.cate_name"
                :value="item.id"
                v-for="item in cateList"
                :key="item.id"
              ></el-option>
            </el-select>
          </el-form-item>
          <el-form-item label="发布状态" style="margin-left: 15px">
            <el-select
              v-model="filter.state"
              placeholder="请选择状态"
              size="small"
            >
              <el-option label="已发布" value="已发布"></el-option>
              <el-option label="草稿" value="草稿"></el-option>
            </el-select>
          </el-form-item>
          <el-form-item>
            <el-button type="primary" size="small" @click="search"
              >筛选</el-button
            >
            <el-button type="info" size="small " @click="resteSearch"
              >重置</el-button
            >
          </el-form-item>
        </el-form>
        <!-- 发表文章的按钮 -->
        <el-button
          type="primary"
          size="small"
          class="btn-pub"
          @click="showPubDialog"
          >发表文章</el-button
        >
      </div>
      <!-- 文章表格区域 -->
      <el-table :data="artList" style="width: 100%" border stripe>
        <el-table-column label="文章标题" prop="title">
          <template v-slot="scope">
            <el-link type="primary" @click="getArtDetail(scope.row.id)">{{
              scope.row.title
            }}</el-link>
          </template>
        </el-table-column>
        <el-table-column label="分类" prop="cate_name"></el-table-column>
        <el-table-column label="发表时间" prop="pub_date">
          <template v-slot="scope">
            {{ formData(scope.row.pub_date) }}
          </template>
        </el-table-column>
        <el-table-column label="状态" prop="state"></el-table-column>
        <el-table-column label="操作">
          <template v-slot="scope">
            <el-button size="mini" type="danger" @click="del(scope.row.id)"
              >删除</el-button
            >
          </template>
        </el-table-column>
      </el-table>
      <!-- 分页区域 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page.sync="q.pagenum"
        :page-sizes="[2, 5, 10, 20]"
        :page-size="q.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      >
      </el-pagination>
      <!-- 发表文章的 Dialog 对话框 -->
      <el-dialog
        title="发表文章"
        :visible.sync="detailVisible"
        fullscreen
        @closed="onClose"
        :before-close="handleClose"
      >
        <!-- 发布文章的对话框 -->
        <el-form
          :model="pubForm"
          :rules="pubFormRules"
          ref="pubFormRef"
          label-width="100px"
        >
          <el-form-item label="文章标题" prop="title">
            <el-input
              v-model="pubForm.title"
              placeholder="请输入标题"
            ></el-input>
          </el-form-item>
          <el-form-item label="文章分类" prop="cate_id">
            <el-select
              v-model="pubForm.cate_id"
              placeholder="请选择分类"
              style="width: 100%"
            >
              <el-option
                :label="item.cate_name"
                :value="item.id"
                v-for="item in cateList"
                :key="item.id"
              ></el-option>
            </el-select>
          </el-form-item>
          <el-form-item label="文章内容" prop="content">
            <!-- 使用 v-model 进行双向的数据绑定 -->
            <quill-editor
              v-model="pubForm.content"
              @blur="$refs.pubFormRef.validateField('content')"
            ></quill-editor>
          </el-form-item>
          <el-form-item label="文章封面" prop="cover_img">
            <img
              v-if="preview"
              :src="preview"
              alt=""
              class="cover-img"
              ref="imgRef"
            />
            <!-- 用来显示封面的图片 -->
            <img
              src="../../../assets/images/cover.jpg"
              alt=""
              class="cover-img"
              ref="imgRef"
              v-else
            />
            <br />
            <!-- 文件选择框，默认被隐藏 -->
            <input
              type="file"
              style="display: none"
              accept="image/*"
              ref="iptFileRef"
              @change="cImage"
            />
            <!-- 选择封面的按钮 -->
            <el-button
              size="small"
              type="success"
              @click="$refs.iptFileRef.click()"
              >+ 选择封面</el-button
            >
          </el-form-item>
          <el-form-item>
            <el-button type="primary" @click="add('已发布')">发布</el-button>
            <el-button type="info" @click="add('草稿')">存为草稿</el-button>
          </el-form-item>
        </el-form>
      </el-dialog>

      <!-- 查看文章详情的对话框 -->
      <el-dialog title="文章预览" :visible.sync="detailVisible" width="80%">
        <h1 class="title">{{ artInfo.title }}</h1>

        <div class="info">
          <span>作者：{{ artInfo.nickname || artInfo.username }}</span>
          <span>发布时间：{{ formData(artInfo.pub_date) }}</span>
          <span>所属分类：{{ artInfo.cate_name }}</span>
          <span>状态：{{ artInfo.state }}</span>
        </div>

        <!-- 分割线 -->
        <el-divider></el-divider>

        <!-- 文章的封面 -->
        <img
          :src="'http://big-event-vue-api-t.itheima.net' + artInfo.cover_img"
          alt=""
        />

        <!-- 文章的详情 -->
        <div v-html="artInfo.content" class="detail-box"></div>
      </el-dialog>
    </el-card>
  </div>
</template>

<script>
// 引入 dayjs
import dayjs from "dayjs";
export default {
  name: "ArtList",
  data() {
    return {
      // 查询参数对象
      q: {
        pagenum: 1,
        pagesize: 2,
        cate_id: "",
        state: "",
      },
      pubForm: {
        title: "",
        cate_id: "",
        cover_img: "",
        state: "",
      },
      addArtVisible: false,
      pubFormRules: {
        title: [
          { required: true, message: "请输入文章标题", trigger: "blur" },
          {
            min: 1,
            max: 30,
            message: "文章标题的长度为1-30个字符",
            trigger: "blur",
          },
        ],
        cate_id: [
          { required: true, message: "请选择文章标题", trigger: "change" },
        ],
        content: [
          { required: true, message: "请选择文章内容", trigger: "blur" },
        ],
        cover_img: [
          { required: true, message: "请选择图片", trigger: "change" },
        ],
      },
      filter: {
        cate_id: "",
        state: "",
      },
      content: "",
      cateList: [],
      artInfo: {},
      preview: "",
      // 文章列表
      artList: [],
      // 保存 文章列表的总条数
      total: 0,
      detailVisible: false,
    };
  },
  methods: {
    showPubDialog() {
      this.detailVisible = true;
    },
    async handleClose(done) {
      const confirmResult = await this.$confirm(
        "此操作将永久删除该文件, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      if (confirmResult === "cancel") return;
      done();
    },
    async initCastList() {
      const { data: res } = await this.$http.get("/my/cate/list");
      if (res.code !== 0) return this.$message.error(res.message);
      this.cateList = res.data;
    },
    cImage(e) {
      const file = e.target.files[0];
      if (file) {
        this.pubForm.cover_img = file;
        this.preview = URL.createObjectURL(file);
      } else {
        this.pubForm.cover_img = "";
        this.preview = "";
      }
      this.$refs.pubFormRef.validateField("cover_img");
    },
    add(state) {
      this.pubForm.state = state;
      this.$refs.pubFormRef.validate(async (valid) => {
        if (!valid) return;
        const fd = new FormData();
        for (let k in this.pubForm) {
          fd.append(k, this.pubForm[k]);
        }
        const { data: res } = await this.$http({
          method: "post",
          url: "/my/article/add",
          data: fd,
        });
        if (res.code !== 0) return this.$message.error(res.message);
        this.$message.success(res.message);
        this.detailVisible = false;
        this.getArtList();
      });
    },
    onClose() {
      this.pubForm = {
        title: "",
        cate_id: "",
        cover_img: "",
        state: "",
      };
      this.preview = "";
    },
    async getArtList() {
      const { data: res } = await this.$http({
        method: "get",
        url: "/my/article/list",
        params: {
          ...this.q,
        },
      });
      if (res.code !== 0) return this.$message.error(res.message);
      this.artList = res.data;
      this.total = res.total;
    },
    formData(val) {
      return dayjs(val).format("YYYY-MM-DD HH:mm:ss");
    },
    handleSizeChange(size) {
      this.q.pagesize = size;
      this.getArtList();
    },
    handleCurrentChange(pNum) {
      this.q.pagenum = pNum;
      this.getArtList();
    },
    resteSearch() {
      this.filter = {
        cate_id: "",
        state: "",
      };
      this.q = {
        state: "",
        cate_id: "",
        pagenum: 1,
        pagesize: 2,
      };
    },
    search() {
      this.q.cate_id = this.filter.cate_id;
      this.q.state = this.filter.state;
      this.q.pagenum = 1;
      this.getArtList();
    },
    del(id) {
      this.$confirm("此操作将永久删除该文章, 是否继续?", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning",
      })
        .then(async () => {
          const { data: res } = await this.$http({
            url: "/my/article/info",
            method: "delete",
            params: {
              id: id,
            },
          });
          if (res.code !== 0) return this.$message.error(res.message);
          this.$message.success(res.message);

          if (this.artList.length === 1 && this.q.pagenum > 1) {
            this.q.pagenum--;
          }
          this.getArtList();
        })
        .catch(() => {
          this.$message({
            type: "info",
            message: "已取消删除",
          });
        });
    },
    async getArtDetail(id) {
      const { data: res } = await this.$http({
        url: "/my/article/info",
        params: {
          id: id,
        },
      });
      if (res.code !== 0) return this.$message.error(res.message);
      this.artInfo = res.data;
      this.detailVisible = true;
    },
  },
  created() {
    this.initCastList();
    this.getArtList();
  },
};
</script>

<style lang="less" scoped>
.search-box {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  .btn-pub {
    margin-top: 5px;
  }
}
// 设置富文本编辑器的默认最小高度
/deep/ .ql-editor {
  min-height: 300px;
}
// 设置图片封面的宽高
.cover-img {
  width: 400px;
  height: 280px;
  object-fit: cover;
}
</style>
